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DE WANE B. SMITH.

HARROW TOOTH SEAT.

No. 3 0,975. Patented Apr. 12, 1887.

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A TTOR/VE Y UNITED STATES PATENT "OFFICE.

DE \VANE B. SMITH, OF UTIOA, NEW YORK, ASSIGNOR TO J. M. CHILDS & 00., OF SAME PLACE.

HARRLOW-TO'OTH SEAT.

SPECIFICATION forming part of Letters Patent No. 360,975, dated April 12, 1887.

Application filed January 18, 1887. Serial No. 224,721. (No model.)

To all whom it may concern.-

Be it known that I, DE WANE B. SMITH, of Utica, in the county of Oneida and State of New York, have invented certain new and useful Improvements in Seats for Curved -Spring- Tooth Harrows; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification.

Myinvention relates to an improvement in circular seats on spring-tooth harrows and the clip for holding the tooth to the seat and harrow-frame; and it consists inthe mechanism hereinafter described and claimed.

In the accompanying drawings, Figure 1 represents a top view of a curved-spring-tooth harrow; Fig. 2 represents a section of the frame with my improved circular seat, curved spring-tooth, and clip attached thereto. Fig. 3 is a top view of my circular seat, the tooth,

and the clip. Fig. 4 is a section on line no ac,

Fig. 3. Fig. 5 represents a top and a section view of a clip of a modified construction, and Fig. 6 is a top view ofthe tooth-seat with annular flange.

Heretofore springmurvedharrow-teeth have been attached to and longitudinally adjustable upon the harrow-frame by the use of curved seats and clips conforming, essentially, to the contourof the tooth where the same is mounted on the frame, and serrated or projecting surfaces have been provided on the surfaces of the seat and clip for more reliable means of holding the tooth between the seat and clip. In these constructions the tooth is not laterally adjustable on its seat to produce a varying cut. use of my improved seat and clip the tooth is longitudinally adj ustablepn the seat for varying the depth of the cut of the tooth, and is also laterally adjustable for varying the cut. I attain the, beneficial results by the use of the mechanism hereinafter pointed out and claimed- I In constructing and applying my invention By the.

to curved spring tooth harrows, I provide seat a, with a central opening, circular in form, in the center of the seat, a" representing the circular opening. The circular opening in the seat should be of sufficient diameter to allow the tooth tosit thereon. It is quite obvious that instead of having a circular open-' ing in the seat an annular projecting flange may be formed on the seat for receiving the tooth. By the foregoing construction the outer edges of the tooth at I I I I, Fig. 3, contact the seat when the clip and bolts are applied, as hereinafter set forth.

For holding the tooth to the seat, I prefer ably provide'cli p 2, Fig. 4, the outer edges having rabbeted or cutaway surfaces 3 3, leaving projection 4 between the rabbeted surfaces. By this construction the tooth is held on the seat under spring tension. The rabbeted ends of the clip allow the projection to pass below the level of the annular flange or opening. Other forms of clip, as shown in Fig. 5, may be used, which for manypurposes will be found satisfactory. The clip is held to the tooth by bolts 6 6 passing through perforations 5 5 in the clip, with screw-threaded nut, whereby the clip, tooth, and seat are firmly clamped to the frame.

The tooth may be longitudinally adjusted and laterally adjusted on the seat by loosening the nuts on the bolts and moving the tooth into the desired position. When the bolts are tightened, the tooth is rigidly held to the seat in the position to which the same has been adj usted.

What I claim is The combination, with a barrow-frame and a spring-curved harrow-tooth seated thereon so as to be adjusted, of a seat having a circular opening or an annular flange formed substantially as described, and means for holding the tooth to the seat, substantially as set forth.

In witness whereof I have affixed my signature in presence of two witnesses.

DE WANE B. SMITH.

Vitnesses: 4 V r EDWIN H. RIsLEY, I D. McGUoKEN. 

